Injection Start Problems - Engine Misfire?

Hi, do you think the fuel injection timing, or something else, is the cause of the jerking/stuttering in my 1Z engine?

It tends to surge around 1400-1800 RPM. Sometimes it even goes up to 2500 RPM, but this only happens when I start accelerating or release the throttle within that range.

Boost pressure is OK according to the LDA, maximum speed downhill is 210 km/h.

Diesel filter just replaced, replacement engine only has 25,000 km on it.

Could it also be due to the crankshaft bolt, or does he definitely need a new one? The engine was replaced a year ago.

The ESP is a BOSCH VE4/1, thank you. Not a VE37 yet.

I would like to attach a Screenshot of VAG-Com, or the log file, but unfortunately, I can't do that here.

'The injection timing never goes below approximately 1 degree, and it adjusts upwards relatively well with a maximum delay of 1 degree. The duty cycle always remains at 3.1% in the lower RPM range.'
In the upper section, there is a very pronounced and fluctuating curve.

Thank you very much[/img].

'It has a slight rumbling sound when idling, and it occasionally hesitates or stutters.'
The idle speed constantly fluctuates around 20 RPM, ranging from 880 to 900.
The engine starts without any subjective issues, even when cold, and fires up after about half a second.

Could the crankshaft position sensor be the cause of my problem? How does it fundamentally work – is it inductive or optical? Could it actually cause such an error?

Hi,

The search function is your friend...

/viewtopic.php?t=4511&highlight=wummern

... or search for "ruckeln 1Z" .... Warning: Risk of being killed!!

The thread mentions, among other things, that the injection timing should be checked, which I have already done. Now I need your expert interpretation of the results.

'Thank you anyway.'

Was ist passiert? Only the engine block was replaced? Were the old fuel injectors and new injectors used?

If so, try experimenting with adaptation channel 1.

CU Gremlin.